Issue #1205 Increase GZIP compression speed for docker:save.

[wrosenuance]

Change the default compression level to 3 in line with JDK-8142920 and increase buffer sizes for copy and compression.

Signed-off-by: William Rose william.rose@nuance.com

[codecov]

Codecov Report

Merging #1206 into master will decrease coverage by 0.03%.
The diff coverage is 0%.

@@             Coverage Diff              @@
##             master    #1206      +/-   ##
============================================
- Coverage     53.08%   53.05%   -0.04%     
  Complexity     1532     1532              
============================================
  Files           150      150              
  Lines          7985     7990       +5     
  Branches       1202     1202              
============================================
  Hits           4239     4239              
- Misses         3328     3333       +5     
  Partials        418      418

Impacted Files	Coverage Δ	Complexity Δ
...ven/docker/access/hc/DockerAccessWithHcClient.java	14.23% <0%> (ø)	13 <0> (ø)	⬇️
...rc/main/java/io/fabric8/maven/docker/SaveMojo.java	24.24% <0%> (-0.76%)	12 <0> (ø)
...abric8/maven/docker/config/ArchiveCompression.java	61.9% <0%> (-10.32%)	8 <0> (ø)

[codecov]

Codecov Report

Merging #1206 into master will decrease coverage by 0.03%.
The diff coverage is 0%.

@@             Coverage Diff              @@
##             master    #1206      +/-   ##
============================================
- Coverage     53.08%   53.05%   -0.04%     
  Complexity     1532     1532              
============================================
  Files           150      150              
  Lines          7985     7990       +5     
  Branches       1202     1202              
============================================
  Hits           4239     4239              
- Misses         3328     3333       +5     
  Partials        418      418

Impacted Files	Coverage Δ	Complexity Δ
...ven/docker/access/hc/DockerAccessWithHcClient.java	14.23% <0%> (ø)	13 <0> (ø)	⬇️
...rc/main/java/io/fabric8/maven/docker/SaveMojo.java	24.24% <0%> (-0.76%)	12 <0> (ø)
...abric8/maven/docker/config/ArchiveCompression.java	61.9% <0%> (-10.32%)	8 <0> (ø)

[rhuss]

Thanks ! I agree that build time matters, and that the increased image size (~ 10% if I understood correctly) it tolerable.